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CVE-2025-71108— usb: typec: ucsi: Handle incorrect num_connectors capability

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确处理错误的num_connectors能力值，可能导致系统无法启动。

AI Predicted 5.3 Difficulty: Trivial EPSS 0.15% · P4

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f< 07c8d2a109d847775b3b4e2c3294c8e1eea75432 affected
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f< 58941bbb0050e365a98c64f1fc4a9a0ac127dba6 affected
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f< f72f97d0aee4a993a35f2496bca5efd24827235d affected
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f< 914605b0de8128434eafc9582445306830748b93 affected
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f< 3042a57a8e8bce4a3100c3f6f03dc372aab24943 affected
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f< 132fe187e0d940f388f839fe2cde9b84106ad20d affected
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f< 30cd2cb1abf4c4acdb1ddb468c946f68939819fb affected
4.13 affected
… +8 more rows
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I. Basic Information for CVE-2025-71108

Vulnerability Information
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Vulnerability Title
usb: typec: ucsi: Handle incorrect num_connectors capability
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Handle incorrect num_connectors capability The UCSI spec states that the num_connectors field is 7 bits, and the 8th bit is reserved and should be set to zero. Some buggy FW has been known to set this bit, and it can lead to a system not booting. Flag that the FW is not behaving correctly, and auto-fix the value so that the system boots correctly. Found on Lenovo P1 G8 during Linux enablement program. The FW will be fixed, but seemed worth addressing in case it hit platforms that aren't officially Linux supported.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确处理错误的num_connectors能力值，可能导致系统无法启动。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f ~ 07c8d2a109d847775b3b4e2c3294c8e1eea75432 -
Linux Linux 4.13 -

II. Public POCs for CVE-2025-71108

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III. Intelligence Information for CVE-2025-71108

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Same Patch Batch · Linux · 2026-01-14 · 43 CVEs total

CVE-2025-71116 9.1 CRITICAL libceph: make decode_pool() more resilient against corrupted osdmaps
CVE-2025-71112 8.8 HIGH net: hns3: add VLAN id validation before using
CVE-2025-71130 7.8 HIGH drm/i915/gem: Zero-initialize the eb.vma array in i915_gem_do_execbuffer
CVE-2025-71120 7.5 HIGH SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf
CVE-2025-71126 7.5 HIGH mptcp: avoid deadlock on fallback while reinjecting
CVE-2025-71128 7.5 HIGH erspan: Initialize options_len before referencing options.
CVE-2025-71131 7.5 HIGH crypto: seqiv - Do not use req->iv after crypto_aead_encrypt
CVE-2025-71132 7.5 HIGH smc91x: fix broken irq-context in PREEMPT_RT
CVE-2025-71127 7.1 HIGH wifi: mac80211: Discard Beacon frames to non-broadcast address
CVE-2025-71109 7.1 HIGH MIPS: ftrace: Fix memory corruption when kernel is located beyond 32 bits
CVE-2025-71136 7.1 HIGH media: adv7842: Avoid possible out-of-bounds array accesses in adv7842_cp_log_status()
CVE-2025-71123 ext4: fix string copying in parse_apply_sb_mount_options()
CVE-2025-71111 hwmon: (w83791d) Convert macros to functions to avoid TOCTOU
CVE-2025-71104 KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer
CVE-2025-71115 um: init cpu_tasks[] earlier
CVE-2025-71103 drm/msm: adreno: fix deferencing ifpc_reglist when not declared
CVE-2025-71117 block: Remove queue freezing from several sysfs store callbacks
CVE-2025-71118 ACPICA: Avoid walking the Namespace if start_node is NULL
CVE-2025-71102 scs: fix a wrong parameter in __scs_magic
CVE-2025-71105 f2fs: use global inline_xattr_slab instead of per-sb slab cache

Showing top 20 of 43 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-71108

Anonymous User
2026-01-15 06:08:15

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